Farmington, UT frost dates
Last spring frostApr 19median date
First fall frostOct 19median date
Growing season183 daysfrost-free
Hardiness zone7bZone 7b
How Farmington compares
- In 8 years out of 10, the last spring frost in Farmington falls between April 1 and May 7, a 36-day window. The first fall frost falls between October 6 and November 4.
- The median last frost is 21 days earlier than the Utah median of May 10.
- Its 183-day growing season is longer than 83% of the 250 Utah places with a regular frost season (state median 148 days).
- The last frost is 14 days later than the zone 7b median of Apr 5. Hardiness zones measure winter cold, not season length, so use these dates rather than a zone 7b chart.
- The weather station records an average of 122 nights a year at or below 32°F.
- Compared with Layton, UT, 12 km away, the last frost here is 10 days earlier than there and the growing season is 9 days longer.
Frost probability
| Chance of frost after | Date |
|---|---|
| 90% (early) | April 1 |
| 50% (median) | April 19 |
| 10% (safe for tender plants) | May 7 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | October 6 |
| 50% (median) | October 19 |
| 90% (late) | November 4 |
Frost here means 32°F (0°C). A median date means half of years have their last frost earlier and half later.
Planting calendar for Farmington, UT
Farmington, UT frost dates — last frost Apr 19, first frost Oct 19, zone 7b. whenisthelastfrost.com
Crop
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Start indoors: Jan 25 to Feb 8Transplant outside: Mar 22 to Apr 5
Start indoors: Feb 8 to Feb 22Transplant outside: May 3 to May 17
Start indoors: Feb 8 to Feb 22Transplant outside: May 3 to May 17
Start indoors: Feb 22 to Mar 8Transplant outside: Apr 26 to May 10
Start indoors: Feb 22 to Mar 8Transplant outside: Mar 29 to Apr 12Sow outdoors: Mar 22 to Apr 26Plant for fall: Aug 24 to Sep 21
Start indoors: Feb 22 to Mar 8Transplant outside: Mar 22 to Apr 5Sow outdoors: Mar 22 to Apr 5Plant for fall: Aug 10 to Aug 31
Start indoors: Feb 22 to Mar 8Transplant outside: Apr 5 to Apr 19Plant for fall: Jul 13 to Aug 3
Start indoors: Feb 22 to Mar 8Transplant outside: Mar 29 to Apr 12Plant for fall: Jul 13 to Aug 3
Start indoors: Feb 22 to Mar 8Transplant outside: Apr 5 to Apr 19Plant for fall: Jul 13 to Aug 3
Start indoors: Mar 8 to Mar 22Transplant outside: May 10 to May 24Sow outdoors: May 10 to May 24
Start indoors: Mar 8 to Mar 22Transplant outside: Apr 26 to May 10
Sow outdoors: Mar 8 to Mar 29Plant for fall: Jul 27 to Aug 17
Sow outdoors: Mar 8 to Mar 29Plant for fall: Aug 24 to Sep 14
Sow outdoors: Mar 15 to Apr 26Plant for fall: Sep 7 to Sep 28
Start indoors: Mar 22 to Mar 29Transplant outside: May 3 to May 10Sow outdoors: Apr 26 to May 10Plant for fall: Aug 3 to Aug 17
Start indoors: Mar 22 to Mar 29Sow outdoors: Apr 26 to May 10Plant for fall: Aug 10 to Aug 24
Start indoors: Mar 22 to Mar 29Sow outdoors: Apr 26 to May 10
Start indoors: Mar 22 to Mar 29Transplant outside: May 3 to May 17
Sow outdoors: Mar 29 to Apr 26Plant for fall: Jul 27 to Aug 10
Sow outdoors: Mar 29 to Apr 26Plant for fall: Aug 10 to Aug 24
Sow outdoors: Mar 29 to Apr 19
Sow outdoors: Apr 5 to May 3Plant for fall: Aug 10 to Aug 24
Sow outdoors: Apr 5 to Apr 26Plant for fall: Aug 24 to Sep 14
Sow outdoors: Apr 26 to May 17Plant for fall: Aug 3 to Aug 17
Sow outdoors: Apr 26 to May 10
Transplant outside: May 3 to May 24
Plant for fall: Oct 5 to Nov 9
Start indoorsTransplant outsideSow outdoorsPlant for fallMedian frost dates
When to plant vegetables in Farmington, UT
| Crop | Start indoors | Transplant | Sow outdoors | Fall crop |
|---|---|---|---|---|
| Onions | Jan 25 – Feb 8 | Mar 22 – Apr 5 | — | — |
| Peppers | Feb 8 – Feb 22 | May 3 – May 17 | — | — |
| Eggplant | Feb 8 – Feb 22 | May 3 – May 17 | — | — |
| Tomatoes | Feb 22 – Mar 8 | Apr 26 – May 10 | — | — |
| Lettuce | Feb 22 – Mar 8 | Mar 29 – Apr 12 | Mar 22 – Apr 26 | Aug 24 – Sep 21 |
| Kale | Feb 22 – Mar 8 | Mar 22 – Apr 5 | Mar 22 – Apr 5 | Aug 10 – Aug 31 |
| Broccoli | Feb 22 – Mar 8 | Apr 5 – Apr 19 | — | Jul 13 – Aug 3 |
| Cabbage | Feb 22 – Mar 8 | Mar 29 – Apr 12 | — | Jul 13 – Aug 3 |
| Cauliflower | Feb 22 – Mar 8 | Apr 5 – Apr 19 | — | Jul 13 – Aug 3 |
| Okra | Mar 8 – Mar 22 | May 10 – May 24 | May 10 – May 24 | — |
| Basil | Mar 8 – Mar 22 | Apr 26 – May 10 | — | — |
| Peas | — | — | Mar 8 – Mar 29 | Jul 27 – Aug 17 |
| Spinach | — | — | Mar 8 – Mar 29 | Aug 24 – Sep 14 |
| Radishes | — | — | Mar 15 – Apr 26 | Sep 7 – Sep 28 |
| Cucumbers | Mar 22 – Mar 29 | May 3 – May 10 | Apr 26 – May 10 | Aug 3 – Aug 17 |
| Zucchini & Summer Squash | Mar 22 – Mar 29 | — | Apr 26 – May 10 | Aug 10 – Aug 24 |
| Winter Squash & Pumpkins | Mar 22 – Mar 29 | — | Apr 26 – May 10 | — |
| Melons & Watermelon | Mar 22 – Mar 29 | May 3 – May 17 | — | — |
| Carrots | — | — | Mar 29 – Apr 26 | Jul 27 – Aug 10 |
| Beets | — | — | Mar 29 – Apr 26 | Aug 10 – Aug 24 |
| Potatoes | — | — | Mar 29 – Apr 19 | — |
| Swiss Chard | — | — | Apr 5 – May 3 | Aug 10 – Aug 24 |
| Cilantro | — | — | Apr 5 – Apr 26 | Aug 24 – Sep 14 |
| Green Beans | — | — | Apr 26 – May 17 | Aug 3 – Aug 17 |
| Sweet Corn | — | — | Apr 26 – May 10 | — |
| Sweet Potatoes | — | May 3 – May 24 | — | — |
| Garlic | — | — | — | Oct 5 – Nov 9 |
Dates come from the median frost dates and common extension-service timing. Adjust for your soil temperature, microclimate and the varieties you grow.
About these dates
Based on 1991–2020 NOAA climate normals for the Farmington 3 Nw, UT weather station, 5 km away (elevation 4,380 ft (1,335 m)).
Frost dates near Farmington
- Kaysville Apr 19 · Oct 19
- Centerville Apr 25 · Oct 24
- Woods Cross Apr 24 · Oct 19
- Layton Apr 29 · Oct 20
- Bountiful Apr 25 · Oct 24
- North Salt Lake Apr 24 · Oct 19
- Syracuse Apr 29 · Oct 20
- Hill Afb Apr 29 · Oct 20
- Clearfield Apr 19 · Oct 19
- Morgan May 25 · Sep 24
Frequently asked questions
When is the last frost in Farmington, UT?
The median last spring frost in Farmington, UT is April 19. There is still about a 10% chance of frost after May 7, so wait until then to plant frost-tender crops like tomatoes and peppers.
When is the first frost in Farmington, UT?
The median first fall frost is October 19, with about a 10% chance of frost before October 6.
How long is the growing season in Farmington, UT?
About 183 days between the median last spring frost and first fall frost.
What planting zone is Farmington, UT?
Farmington, UT is in USDA hardiness zone 7b.